types of chips

Question 1

how chips are classified

Answer 1

a. discontinuous chip
b. continuous chip
c. continuous chip w/ a built-up edge

Question 2

how are chips formed

Answer 2

due to compressive stress;

increases until plastic flow/rupture/fracture occurs

Question 3

discontinuous chip

Answer 3

• segmented

conditions:

• brittle material
• small rake angle
• low cutting speed
• large depth of cut
• large feedrate
• lack of lubricant

Question 4

continuous chip

Answer 4

• longer in length & break at consistent intervals

conditions:

• ductile material
• large rake angle
• high cutting speed
• small depth of cut
• low feedrate
• efficient use of lubcricant
• cutting tool material w/ less pressure-weld tendencies

Question 5

continuous chips w/ BUE

Answer 5

• BUE; small particles of chips pressure-welded to rake face of tool

conditions:

• ductile material
• low rake angle
• low cutting speed
• high depth of cut
• high feedrate
• poor use of lubricant